inmetr provide access to historical data measured by meteorological stations available in the Meteorological Database for Education and Research (BDMEP) from National Institute of Meteorology (Instituto Nacional de Meteorologia - INMET), Brazil.
Installation of inmetr from GitHub is easy using the devtools package.
library(devtools)install_github('jdtatsch/inmetr')Load package
library(inmetr)To search for some meteorological station from INMET we can use the bdmep_stations() function.
info <- bdmep_stations()head(info) name state id
1 ACARAU CE 82294
2 AGUA BRANCA AL 82989
3 AIMORES MG 83595
4 ALAGOINHAS BA 83249
5 ALTAMIRA PA 82353
6 ALTO PARNAIBA MA 82970
This function return a data frame with station names, the brazilian state and OMM code. OMM code is a necessary argument to import_data() function. This function download and tidy data from a meteorological station.
Here, we show how to find the OMM code for the meterological station at Santa Maria in Rio Grande do Sul state.
code <- subset(info, name == "SANTA MARIA")
code <- subset(code, select = id)[[1]]
code[1] 83936
Now we can get the data for Santa Maria city, from 1961 to the current day.
start_date <- "01/01/1961"
end_date <- format(Sys.Date(), "%d/%m/%Y")
sm <- import_bdmep(id = code,
sdate = start_date,
edate = end_date,
email = "your-email",
passwd = "your-password")Login sucessfull.
# check de start date
head(sm) date id prec tair tw tmax tmin urmax patm pnmm wd
1 1961-01-01 00:00:00 83936 NA NA NA 31.9 NA NA NA NA NA
2 1961-01-01 12:00:00 83936 NA 23.9 21.4 NA 18.1 79 990.3 NA NA
3 1961-01-01 18:00:00 83936 NA 30.6 25.1 NA NA 63 988.2 NA NA
4 1961-01-02 00:00:00 83936 NA 27.7 24.4 34.0 NA 75 986.4 NA NA
5 1961-01-02 12:00:00 83936 0 26.4 23.8 NA 23.5 79 989.4 NA NA
6 1961-01-02 18:00:00 83936 NA 30.8 25.2 NA NA 62 989.0 NA NA
wsmax n cc evap ur ws
1 NA 7.7 NA 1.1 73.00 1.000000
2 0 NA 0 NA NA NA
3 3 NA 9 NA NA NA
4 0 6.0 0 2.7 74.25 0.666667
5 0 NA 4 NA NA NA
6 1 NA 10 NA NA NA
# check de end date
tail(sm) date id prec tair tw tmax tmin urmax patm pnmm
52316 2016-07-09 12:00:00 83936 12.8 11.4 NA NA 11.4 100 1007.0 1019.6
52317 2016-07-09 18:00:00 83936 NA 13.8 NA NA NA 84 1001.8 1014.3
52318 2016-07-10 00:00:00 83936 NA 12.0 NA 14.6 NA 98 1002.8 1015.4
52319 2016-07-10 12:00:00 83936 6.3 11.0 NA NA 9.6 100 1003.1 1015.7
52320 2016-07-10 18:00:00 83936 NA 14.4 NA NA NA 94 1000.2 1012.7
52321 2016-07-11 00:00:00 83936 NA 14.0 NA NA NA 95 1000.3 1012.8
wd wsmax n cc evap ur ws
52316 14 1.54332 NA 10.0 NA NA NA
52317 14 1.02888 NA 10.0 NA NA NA
52318 14 1.54332 0 0.0 NA 96 1.37184
52319 14 0.51444 NA NA NA NA NA
52320 14 2.05776 NA 10.0 NA NA NA
52321 14 1.54332 NA 7.5 NA NA NA
A description about the meteorological variables can be obtained with data_description().
data_description() varname description unit
1 date date and time information -
2 id station ID -
3 prec precipitation mm
4 tair air temperature deg C
5 tw wet bulb temperature deg C
6 tmax maximum air temperature deg C
7 tmin minimum air temperature deg C
8 urmax maximum relative humidity %
9 patm atmospheric pressure hPa
10 pnmm mean sea level atmospheric pressure hPa
11 wd wind direction deg
12 wsmax wind gust m/s
13 n sunshine hours h
14 cc cloud cover -
15 evap evaporation mm
16 ur relative humidity %
17 ws wind speed m/s
To download and write data from multiple stations to files, we can do a looping in stations id.
# first 3 stations of info table
nstns <- 3
stns_ids <- info$id[1:nstns]
stns_ids## [1] 82294 82989 83595
# looping on stations id
stn_files <- sapply(stns_ids,
function(i){
# i = 82294
Sys.sleep(sample(5:15, 1))
x <- import_bdmep(id = i,
sdate = "01/01/1961",
edate = "29/08/2016",
email = "your-email",
passwd = "your-password")
# write data to a csv file (named "id.csv") in the work directory
ofname <- paste0(i, ".csv")
write.csv(x, file = ofname)
# check if files were downloaded
if(file.exists(ofname)){
out <- ofname
} else {
out <- "NA"
}# end if
return(out)
}# end function
)# end sapply## Login sucessfull.
## Login sucessfull.
## Login sucessfull.
stn_files## [1] "82294.csv" "82989.csv" "83595.csv"
citation("inmetr")To cite package 'inmetr' in publications use:
Tatsch, J.D. 2016. inmetr: A Package to Import Historical Data
from Brazilian Meteorological Stations. Zenodo,
doi:10.5281/zenodo.59652.
A BibTeX entry for LaTeX users is
@Manual{,
title = {inmetr: A Package to Import Historical Data from Brazilian Meteorological
Stations},
author = {Jonatan Tatsch},
year = {2016},
note = {R package version 0.0.1},
doi = {http://doi.org/10.5281/ZENODO.59652 },
institution = {Universidade Federal de Santa Maria-UFSM},
url = {https://github.com/jdtatsch/inmetr},
address = {Santa Maria-RS, Brazil},
}